:root {
  color-scheme: dark;
  --color-surround: #1a1a1e;
  --color-board: #ffffff;
  --color-surface: #2b2b31;
  --color-surface-hover: #37373e;
  --color-surface-active: #43434b;
  --color-border: rgb(255 255 255 / 8%);
  --color-text-primary: #f2f3f5;
  --color-text-secondary: #b5bac1;
  --color-accent-solid: #5865f2;
  --color-focus: #00a8fc;
  --shadow-raised:
    0 0 0 1px rgb(0 0 0 / 30%), 0 2px 4px rgb(0 0 0 / 18%), 0 8px 24px rgb(0 0 0 / 28%);
  --shadow-board:
    0 0 0 1px rgb(0 0 0 / 40%), 0 4px 12px rgb(0 0 0 / 22%), 0 16px 48px rgb(0 0 0 / 30%);
  font-family: "gg sans", "Noto Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--color-surround);
  color: var(--color-text-primary);
  user-select: none;
}

.stage {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 56px 16px 84px;
}

.board {
  position: relative;
  border-radius: 12px;
  background: var(--color-board);
  box-shadow: var(--shadow-board);
  overflow: hidden;
  touch-action: none;
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
}

.board.erasing canvas {
  cursor: cell;
}

.cursors {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.cursor {
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  align-items: center;
  gap: 4px;
  will-change: transform;
  transition:
    transform 80ms linear,
    opacity 150ms ease-out;
}

.cursor::before {
  content: "";
  width: 10px;
  height: 10px;
  margin: -5px 0 0 -5px;
  border-radius: 50%;
  background: var(--cursor-color);
  box-shadow: 0 0 0 2px #ffffff;
}

.cursor span {
  padding: 2px 6px;
  border-radius: 6px;
  background: var(--cursor-color);
  color: #ffffff;
  font-size: 12px;
  font-weight: 600;
  line-height: 16px;
  white-space: nowrap;
}

.cursor[data-hidden] {
  opacity: 0;
}

.people {
  position: fixed;
  top: 12px;
  left: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 4px 4px;
  border-radius: 20px;
  background: var(--color-surface);
  box-shadow: var(--shadow-raised);
  font-size: 14px;
  font-weight: 500;
}

.people:empty {
  display: none;
}

.avatars {
  display: flex;
}

.avatars img {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 2px solid var(--color-surface);
  outline: 1px solid rgb(255 255 255 / 8%);
  outline-offset: -1px;
  background: var(--color-surface-hover);
}

.avatars img + img {
  margin-left: -8px;
}

.people .count {
  color: var(--color-text-secondary);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.toolbar {
  position: fixed;
  bottom: 16px;
  left: 50%;
  translate: -50% 0;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 6px;
  border-radius: 16px;
  background: var(--color-surface);
  box-shadow: var(--shadow-raised);
}

.group {
  display: flex;
  gap: 4px;
}

.group + .group {
  padding-left: 16px;
  border-left: 1px solid var(--color-border);
}

.tool {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition:
    background-color 100ms ease-out,
    color 100ms ease-out,
    scale 200ms ease-out;
}

.tool svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.tool:active {
  scale: 0.96;
}

.tool[aria-checked="true"],
.tool[aria-pressed="true"] {
  background: var(--color-surface-active);
  color: var(--color-text-primary);
}

.tool:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 2px;
}

@media (hover: hover) {
  .tool:hover {
    background: var(--color-surface-hover);
    color: var(--color-text-primary);
  }
}

.swatch {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--swatch);
  box-shadow: inset 0 0 0 1px rgb(255 255 255 / 12%);
}

.tool[aria-checked="true"] .swatch {
  box-shadow:
    0 0 0 2px var(--color-surface-active),
    0 0 0 4px var(--color-text-primary);
}

.dot {
  border-radius: 50%;
  background: currentColor;
}

.notice {
  position: fixed;
  top: 12px;
  left: 50%;
  translate: -50% 0;
  padding: 8px 14px;
  border-radius: 8px;
  background: var(--color-surface);
  box-shadow: var(--shadow-raised);
  color: var(--color-text-secondary);
  font-size: 14px;
  white-space: nowrap;
}

@media (max-width: 520px) {
  .toolbar {
    gap: 8px;
  }

  .group + .group {
    padding-left: 8px;
  }

  .tool {
    width: 32px;
    height: 32px;
  }
}